Exxon_spill = 260 thousand bbl (1/3) * 150 million cars * 10000 miles/car/year * 5 qt/3000 miles ? Exxon_spills/month = 1.58985 Exxon_spills/month
500 ft wc * 12 cent/kWh ? $ / acre ft = 61.4493 $ / acre ft
30 megawatt ; 4 ton/acre/year * 8750 btu/lb * 40% ? acre = 32025.3 acreSo how big is this forest? (as a square)
sqrt(32025.3 acre) ? km = 11.3843 km (on a side)How much wood is that? (Assume the density of pine is approximately 550 kg/m^3)
32025.3 acre * 4 ton/acre/year ; (550 kg/m^3 ? million board_feet/month = 7.46176 million board_feet/monthor, for a more tangible perspective...
7.46176 million board_feet/month ; 12 feet * pi * (6 inch)^2 / tree ? trees/day = 2169.09 trees/dayAssuming an average power from the sun of 200 watts per square meter, what is the overall solar efficiency of the "system" ?
30 megawatt / (32025.3 acre * (200 W/m^2)) ? % = 0.115739 %
Calchemy Software Inc.
Fort Collins, CO
Last Updated 6/21/2009